| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [is] [verb] at | 70 |
|
| 2 | what [is] [verb] at | 70 |
|
| 3 | what [is] [v-ing] at | 50 |
|
| 4 | what [is] happen at | 47 |
|
| 5 | what [is] happening at | 46 |
|
| 6 | what is [verb] at | 41 |
|
| 7 | what 's [verb] at | 29 |
|
| 8 | what [is] [vb pp] at | 18 |
|
